Daylight developing apparatus



@am 25g 1932.

G. A. MAGNUS DAYLIGHT DEVELOPING AIPRTUS Filed pr 11. 1951 l persgie generally the appearance o` .the developing ap aratus;

ig. 2 is a side elevation taken in section, illustrating the construction ofthe various l compartments of the developing container;

' tank A a ly secured toget zthe li uids necessary Acompartments here shown being Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2; c

Fig. 4.- is an enlarged detail view of one corner of the container with the coverV removed; and

Fig. 5 isl an enlarged detail viewof the u per corner of the developiii compartment il Austrating the manner in w ich the light seal is effected. v

Referring more particularly to the drawing wherein corresponding parts are designated by like numerals throughout the several views thereof, the apparatus in the preferred embodiment of my invention herein illustrated comprises generally a casin or container 1G, which may be constructed of wood or other suitable material that will hold in the developing proeess. or convenience the casin is rovided with an outer sheet metal covering indicated by numeral 11, a handle 12 havin hooked ends 13 extending through suita le reinforced openings 14 provided in the side walls of the container to permit the develo in to be easily' carried wherever desire The inside of the casing is formed with a plurality of compartments, herein designated b numerals 15, 16, 17, 18 and 19 res ctive y, all bein made of sheet metal suiter as by soldering or the like, so that each compartment is made liquidproof. Each compartment ma beconstructed to accommodate plate or lm holders of any articular size. In the and or purposes of illustration, the various designed to accommodate by ten plate holder.

Each compartment is provided with a separate cover, generally indicated by numeral 20, each cover being hinged tothe casing 10 at one end, as shown by numerals 21, the otherend of each cover being provided with a spring clip 22, each having an opening 23 provided therein, which are adapted to coo rate with ins 24 to maintain each cover c osed when t e developing apparatus is not in use and thus prevent the solution contained in the various compartments from being spilled.

o he .compartment I15, heretofore mentione is so constructed as to form a developa standard eight partment, these plates serve the p slate or film holder Y solution may faces of the p to be yie dably spring leaf 32 fastened vto the rear wall 33 present instance 4 ing chamber whereby the exposed plates or films may b'e rapidly develo ed as soon after exposez.J as it may be desired.) This compartment is provided at its top with pairs of opposed plates of spring material, generally in icated by numeral 25 and at its bottom with pair of opposed lates of spring .material generally indicated) by numeral 26, which are soldered or brazed to the inside walls of the compartment and in spaced relation, as indicated in Fig. 2. Whenv the late or film holder is positioned in the devfgoping compurpose of properly positioning the in the com artment an maintaining the same space from the side walls of the developing compartment so that the developing in ready access to the surates or films in the holder. The spring retaining plates 25 and 26, heretofore mentioned, are of sutiicient iiexibility to permit manual insertion or removal of the plate or film holder durin process. Near its top en compartment is provided with a lon 'tudinally extending metallic stri 27 suita ly secured to the side walls 28 oi) the developing compartment, `as by solderin or the ike The op ite side wall 29 is\ ormed with a socketedwsortion 30, within which is adapted the developing the developin mounted a lioating bar 31, a

of the socketed plortion 30, as by rivets 34, serving to urge t e bar 31 outward and into en agement with the film ada ter.

he strip 27 and the Heating ar 31 are both formed with op ose'd grooves 35 and36 ren spectively, whicli) extend len hwise thereof, as shown by Fig. 3, and whic are adapted to receive the ton es 3? and 38 forming a part of the standaruplate or lm holder to provides light-tight closure, which when the holder is in position in the developing compartment prevents light ra s from striking the sensitized surface of t e photographic plate or film. i

An overflow chamber 39, offset from the developing compartment as shown in Fig. 2 and having an elongated slotted opening 40 in direct communication with the compartment 15, accommodates the excess of developing solution in the developing compartment caused by the rise of the solution when the plate or film holder is lowered into the developing compartment. Openings 41 formed in the side wall 42 of the overow chamber, may also be Iprovided to permit possible air trappedin t e escape.

paratns in the manner above descri possibility of the hotographer carrying his own developing la oratory wherever desired overflow chamber to readily) By constructing a portable develorg agi-'- t e les yius

l 'fnee depending on the type oi:v developer.' used M comporti eet and thereafter ir L quie! o solution contained nient f the safety slides i f e 1 After wos ing or ringing trom. one-quer to one minute the holder containing the platee w or filme ie placed in the eolutiori in compartment l? for from one and one-foal'l minutes five minutem The hoidef is their immereed in the washing solo`1 i t ie 'iro er c lith but desire to eveil e l h 'E l "a o 'y ations end modiicetrone *roep claimde., 'thus described. J-iveroion9 li claim ee new and desire to eeccre h3? Potent e l., itogrccni deveiopingg op oratore oi the c ree decorileed. rt= or containing e photographic l .i liider adapted to loe received seid W oortment whereby said duid may chemically treat the sensitized portions of the iiim in said holder, and closure-forming means C3 in said compartment cooperating with said iill1 holder to form a light-tight joint there w1 2. A photographic film developing apparatus having a compartment to receive a. fluid, a film holder adaplted to be received in said compartment w ereby the lm in said holder may be chemically treated, and closure-forming means including a yieldable member mounted in said compartment adjacent the upper end thereof cooperating with the exposed endo said film holder to form a light-tight closure therevffitl'x.v

3. n a hotographic film developing apparatus oi" the cieee described-9 e coinpert ment for o, t; otoggrophi 'ilm heid i meer `ed e. iii-:ed t em spring cette i spaced eport so conetru that when said holder compartment". the sides o e ere engaged hyeeid com tight joint hetween the iiolde :seid ctemps-rtA eri-f" ce received @im in soii ciosore ionic" compartments members ioeiog movable rele' eoid members heine spaced e A wl. rei f wh ie received i l M l seid dim he er here to @dect iigl. holder and eidee oi.

spring means cooperating wie saro reietive ly movabie ciosure forming; embers yieldma inglyr ur e said member scid holder against t evother cloni-reforming member .establish said light-t' t joieto no 6. A photographic v of sai for daylight photogra hy, comprising a cas.

ratus of the class described comprisin a com artment for receiving the; fluid, a hol er adapted to be received in said compartment whereby the film in said holder may be chemicall treated, closure formingv members mounte in said com artment, one l of said members being movab e relative to the other said members being spaced apart whereby when said holder is received in said compartment the sides of said film holder are enaged by'said members to effect a li htti t closure between the holder and the sides o said compartment, and an overflow chamber having an aperture in communication with said compartment to ermit the delivery and escape of fluid to and rom said compartment whereby to maintain the level of fluid in said com artment above the edge of the film in said older.

7. A hotographicv film developing appa-` ratus o the class described, comprisin l a m com artment for receivin a Huid a hemp g ing members mounted Ainpsaid compartment one of'sa'id closure-forming members being spring actuated and movable relative to the other member, said members bein adapted to engage the sides o f said film older to effect a light-tight r closure therewith, and spacin members supported in the lower end compartment adapted for retaining said film holder spaced from the sides of said compartment so that the exposed portion of the film will be freel resented to the chemical action of the llui 1n said compartment.

8. A portable film developing apparatus ing, a handle for sai casing, a developing com artment'in said casing for receiving the flui a film holder adapted to be received in said compartment, oppositely disposed clos-- ure forming members mounted in said compartment one of said closure-forming memers being spring actuated and being movabl mounted relative lto the other member an adapted to engage the sides Vof said holder to effect a light-tight closure therewith, a plurality of spring clips carried on the sides of said compartment and cooperatin with said film holder to retain the said film older spaced relative tothe sides of said compartment whereby the exposed portion of the film may be freely accessible to the chemical action of the fluid in said compartment, and an overflow chamber having an aperture in communication with said developin compartment to permit the delivery an escape of fluid into and out of said developing compartment whereby to maintain the level of fluid in said develo in compartment above the upper edge of t e lm in said holder.

In testimony whereof I aix my signature GEORGE A. MAGNS.

er adapted to be received in said compartment, oppositely disposed closure `form-v 

